Fluorinated graphene electrode material and preparation method thereof

A technology of fluorinated graphene and electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of immature preparation technology of fluorinated graphene and few researches on fluorinated graphene, and achieve low preparation cost, The preparation process is simple, the effect of high voltage platform and specific capacity

Inactive Publication Date: 2014-02-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation technology of fluorinated graphene is still immature, and there are not many researches on fluorinated graphene.

Method used

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  • Fluorinated graphene electrode material and preparation method thereof
  • Fluorinated graphene electrode material and preparation method thereof
  • Fluorinated graphene electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 20 mg of fluorinated graphite and add it to 100 mL of tetrahydrofuran, stir at a constant speed for half an hour to disperse the fluorinated graphite in acetone, then add it to a stainless steel reaction kettle, put the reaction kettle into a muffle furnace, and heat at 60°C for 12 hours. After the end, the obtained suspension was ultrasonicated for 6 hours, and then the ultrasonicated suspension was centrifuged at a speed of 500r / min for 30 minutes to remove the lower solid, and the obtained solution was suction filtered to obtain a filter cake, which was dried at 60°C , to obtain fluorinated graphene materials. Weigh a certain proportion of fluorinated graphene, acetylene black, PVDF solution (dissolved in NMP, mass fraction 10%), fluorinated graphene, acetylene black, polyvinylidene fluoride mass ratio is 80:10:10, and then It was ground in a mortar and 2ml of NMP was added dropwise. Spread the ground slurry evenly on the aluminum foil, place it in a blast ove...

Embodiment 2

[0022]Weigh 50 mg of fluorinated graphite and add it to 100 mL of acetone, stir at a constant speed for half an hour to disperse the fluorinated graphite in acetone, then add it into a stainless steel reaction kettle, heat at 80°C for 10 h, after the heating time is over, ultrasonicate the obtained suspension for 8 h, Then the supersonicated suspension was centrifuged at 1000r / min for 30min to remove the solids in the lower layer, and the resulting solution was suction-filtered to obtain a filter cake, which was dried at 60°C to obtain a fluorinated graphene material. Weigh a certain proportion of fluorinated graphene, acetylene black, PVDF solution (dissolved in NMP, mass fraction 10%), fluorinated graphene, acetylene black, polyvinylidene fluoride mass ratio is 75:15:10, and then It was ground in a mortar and 2ml of NMP was added dropwise. Spread the ground slurry evenly on the aluminum foil, place it in a blast oven and bake at a certain temperature for 1-2 hours. The bake...

Embodiment 3

[0024] Weigh 60 mg of fluorinated graphite and add it to 100 mL of isopropanol, stir at a constant speed for half an hour to disperse the fluorinated graphite in acetone, then add it into a stainless steel reaction kettle, put the reaction kettle into a muffle furnace, and heat at 100°C for 12 hours. After the heating time is over, ultrasonicate the obtained suspension for 10 h, then centrifuge the ultrasonicated suspension at a speed of 1500 r / min for 20 min to remove the lower layer of solids, filter the obtained solution with suction to obtain a filter cake, and filter the filter cake at 60 °C Dry to obtain the fluorinated graphene material. Weigh a certain proportion of fluorinated graphene, acetylene black, PVDF solution (dissolved in NMP, mass fraction 10%), fluorinated graphene, acetylene black, polyvinylidene fluoride mass ratio is 82:8:10, and then It was ground in a mortar and 2ml of NMP was added dropwise. Spread the ground slurry evenly on the aluminum foil, place...

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Abstract

The invention discloses a fluorinated graphene electrode material and a preparation method thereof. The preparation method comprises the steps: carrying out thermal intercalation of graphite fluoride by using an organic solvent with low boiling point; carrying out ultrasonic stripping of graphite fluoride; centrifuging to remove graphite fluoride which is not stripped, carrying out suction filtration of the centrifuged upper solution to obtain fluorinated graphene, and adding a conductive agent and an adhesive into fluorinated graphene to obtain the fluorinated graphene electrode material. According to the technical scheme of the invention, the prepared composite material has the advantages of high specific capacitance and voltage platform and the like, and is suitable for use in electrode materials of lithium batteries.

Description

technical field [0001] The invention relates to a fluorinated graphene lithium battery electrode material and a preparation method thereof, belonging to the technical field of energy storage materials. Background technique [0002] The fluorination of carbon materials can be traced back to decades ago. From the earliest fluorinated graphite to fluorinated fullerene, fluorinated carbon nanotubes to fluorinated graphene, fluorocarbons have always been a research hotspot due to their excellent properties. , and will shine brightly in future technological applications. [0003] Fluorinated graphene can be regarded as graphene being partially or fully fluorinated, and the sp2 structure in graphite is partially or completely transformed into sp3, but still maintains a sheet structure and is the thinnest insulator, which can be called a two-dimensional polyquaternary Vinyl fluoride. Become a new two-dimensional member of the carbon family. Graphene is considered to be the origin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCH01M4/583Y02E60/10
Inventor 封伟孙传彬李瑀冯奕钰
Owner TIANJIN UNIV
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